Assassin's Creed 3 – The Homestead: Encyclopedia of the Common Man

IntroductionThis quest is unlike any other in the game. It is best completed over the course of the whole game. For you to complete it though you need every settler for the homestead present. By its nature, it is something that should be done over time. The homesteaders will be engaged in different activities throughout the course of the game. It is better to check each after a homestead mission to see if they are engaged in something that can be scanned. There are a number of different activities for each so check back frequently.

To check just such an instance, switch to eagle vision and look on the trainer, artisan or crafter. If they glow gold, scan them with L1/LB.